There is a change in license zip between 2.3.4.ER1 and 2.3.4.CR1.
It is missing license info in licenses.xml in CR1:
<dependency>
<groupId>io.reactivex.rxjava3</groupId>
<artifactId>rxjava</artifactId>
<version>3.0.4.redhat-00001</version>
<licenses/>
</dependency>